DE102015111385A1 - Solenoid actuator - Google Patents

Abstract

A piston (651, 652) is formed of a soft magnetic material so as to have an end connected to a regulating pin (601, 602). A permanent magnet (521, 522, 531, 532, 541) is fixed to a fixed portion which is fixed relative to the piston (651, 652), so that the piston (651, 652) is attracted in a retraction direction. A coil (451, 452, 453, 454) generates a magnetic flux in an opposite direction of the permanent magnet (521, 522, 531, 532, 541), so that a magnetic attraction force is reduced, which attracts the piston (651, 652) , A spring (761, 762) biases the regulating pin (601, 602) in an extension direction. The spring (761, 762) exerts a biasing force on the regulating pin (601, 602) so that the regulating pin is moved in the extending direction when current is supplied to the coil (451, 452, 453, 454), so that the magnetic Attraction of the permanent magnet (521, 522, 531, 532, 541) is reduced. A magnetic field detection unit (801, 802) is disposed on a magnetic circuit that conducts a magnetic flux generated by the permanent magnet (521, 522, 531, 532, 541) and the coil (451, 452, 453, 454), so that it captures a magnetic flux density.

Description

Technical area

The present disclosure may relate to a solenoid actuator configured to extend a regulating pin so that the regulating pin is fitted in a fitting groove, thereby switching a position of a slider. The present disclosure may relate to a solenoid actuator used in a valve lift control apparatus for an internal combustion engine.

background

Conventionally, a known valve lift control device is configured to control an increase of an intake valve or an increase of an exhaust valve for an internal combustion engine. A valve lift control device may rotate together with a camshaft and may shift a position of a slider that is movable in an axial direction relative to the camshaft. A known solenoid actuator can be used to switch the position of the slider. For example, the solenoid actuator may alternately activate one of two regulating pins according to the movable direction of the slider. In this way, the solenoid actuator can fit a front end of the regulating pin to a fitting groove formed in the slider.

short version

A patent document 1 may, for. B. an actuator for switching a valve lift can be removed. The actuator may include a fixed core disposed inside a coil and a movable unit equipped with a permanent magnet at one end. The movable unit may be movable toward the stationary core and may move away from the stationary core. A magnetometric sensor may be disposed radially outward of the permanent magnet so as to detect a change in the magnetic field associated with movement of the permanent magnet. In this way, the magnetometric sensor can determine an operating state of the movable unit.
(Patent Document 1) U.S. Patent No. 8,448,615

The actuator of Patent Document 1 may require space for installation and wiring of the magnetometric sensor near the mobile unit. Thus, the configuration of the actuator may be complex. In addition, the configuration takes over the movement of the permanent magnet and the movable unit. Therefore, the configuration may not be applicable to an actuator in which the permanent magnet is set on a stationary side.

The present disclosure is directed to the problem described above.

It is an object of the present disclosure to provide a solenoid actuator for a valve lift control device. The valve lift control device is configured to control an increase of an intake valve or an increase of an exhaust valve for an internal combustion engine. The valve lift control device has a slider which is rotatable with a camshaft and is movable in an axial direction relative to the camshaft. The solenoid actuator is configured to extend a regulating pin when a leading end of the regulating pin is fitted in a fitting groove of the slider. The solenoid actuator is further configured to cause the regulating pin to be retracted by exerting a torque of the camshaft when the front end of the regulating pin is retracted out of the fitting groove. The solenoid actuator has the regulating pin configured to extend toward the fitting groove. The solenoid actuator further includes a piston formed of a soft magnetic material. The piston has an end connected to the regulating pin. The solenoid actuator also has a permanent magnet secured to a fixed region fixed relative to the piston and configured to attract the piston in a retraction direction. The solenoid actuator further includes a coil configured to generate a magnetic flux in an opposite direction of the permanent magnet so that a magnetic attraction force that attracts the piston is reduced. The solenoid actuator also includes a spring that is configured to bias the regulating pin in an extension direction. The spring is configured to apply a biasing force to the regulating pin so that the regulating pin is moved in the extending direction when current is supplied to the coil, so that the magnetic attraction force of the permanent magnet is reduced. The solenoid actuator further includes a magnetic field detection unit disposed on a magnetic circuit configured to conduct a magnetic flux generated by the permanent magnet and the coil and configured to have a magnetic flux density detected.

It is another object of the present invention to provide a solenoid actuator having a piston consisting of a soft magnetic material is formed. The solenoid actuator also has a regulating pin connected to one end of the piston. The regulating pin has a front end that is configured to extend and retract. The solenoid actuator further includes a permanent magnet secured to a fixed region fixedly disposed relative to the piston. The permanent magnet is configured to generate a magnetic flux and a magnetic attraction force so that the piston is attracted in a retraction direction. The solenoid actuator further includes a coil configured to generate a magnetic flux in an opposite direction of the magnetic flux of the permanent magnet so as to cancel the magnetic flux of the permanent magnet and reduce the magnetic attraction force. The solenoid actuator further includes a spring configured to apply a biasing force to the regulating pin so that the regulating pin moves in an extending direction when power is supplied to the coil, so that the magnetic attraction force of the permanent magnet is reduced , The solenoid actuator further includes a magnetic field detection unit disposed on a magnetic circuit configured to conduct the magnetic flux of the permanent magnet and the magnetic flux of the coil, the magnetic field detection unit configured to detect a magnetic flux density ,

Brief description of the drawing

The foregoing and other aspects, features and advantages of the present invention will become more apparent from the following detailed description made with reference to the accompanying drawings. Show it:

1 10 is a sectional view showing a solenoid actuator in a de-energized state according to a first embodiment of the present disclosure;

2 a plan view as seen along an arrow II in 1 ;

3 a sectional view showing the solenoid actuator in a power supply state of a first coil;

4 an enlarged view showing a portion of the solenoid actuator in 3 shows;

5 a sectional view showing the solenoid actuator, and showing a magnetic flux flowing through a magnetic circuit in an energized state in which a first piston is retracted;

6 10 is a sectional view showing a magnetic flux flowing through a magnetic circuit in a state of an extension start of a first piston when the supply of current to the first coil in the state of 5 is started;

7 5 is a sectional view showing a magnetic flux flowing through a magnetic circuit in a state of terminating an extension movement of the first piston when the supply of current to the first coil in the state of FIG 6 is terminated;

8A a timing diagram showing a coil current, 8B a timing chart showing an output of a magnetometric sensor, and 8C a time chart showing a Regulierstifthub, in a coil current supply state;

9 10 is a sectional view showing a solenoid actuator according to a second embodiment of the present disclosure;

10 10 is a sectional view showing a solenoid actuator according to a third embodiment of the present disclosure;

11 10 is a sectional view showing a solenoid actuator according to a fourth embodiment of the present disclosure; and

12 a sectional view showing a solenoid actuator according to another embodiment of the present disclosure.

Detailed description

Hereinafter, a solenoid actuator according to embodiments of the present disclosure will be described with reference to the drawings. The publication of the unaudited Japanese Patent Application No. 2013-258888 discloses a valve lift control device. The valve lift control device includes a cam that is integrated with a slider that rotates together with the camshaft. The cam is intended to control an increase of an intake valve or an increase of an exhaust valve for an internal combustion engine. The solenoid actuator is z. B. set to the valve lift control device.

A slider for a valve lift control device is rotatable together with a camshaft and movable in the axial direction relative to the camshaft. The slider has an outer periphery defining a fitting groove that gradually changes in the axial position according to the rotation angle. The The solenoid actuator drives one of two operating-side regulating pins in accordance with an instruction from a control unit. In this way, the solenoid actuator adjusts a front end of the operating side regulating pin to the fitting groove of the slider, thereby rotating the slider in the axial direction. When the solenoid actuator moves the front end of the operating-side regulating pin away from the fitting groove, the operating-side regulating pin is pushed back by exerting a torque of the camshaft. The publication of the unaudited Japanese Patent Application No. 2013-258888 describes in detail the configuration and operation of the valve lift control device. Thus, a detailed description of the configuration and operation is omitted.

First Embodiment

A configuration of a solenoid actuator according to a first embodiment of the present disclosure will be described with reference to FIG 1 to 4 described. A solenoid actuator 401 includes two regulating pins 601 and 602 which are arranged parallel to each other. The solenoid actuator 401 selectively activates one of the two regulating pins 601 and 602 as an operational regulator. 1 Fig. 10 is a sectional view showing a state in which none of the regulating pins 601 and 602 is activated. 3 and 4 are sectional views each showing a state in which the first regulating pin 601 is activated. Sectional views that arise when you 3 and 4 Turning in the horizontal direction, may represent a state in which the second regulating pin 602 is activated. Therefore, the drawing of this state can be dispensed with. As in 2 is shown is a solenoid actuator 40 relative to the horizontal direction in the drawing symmetrically, with the exception of the attachment areas 475 coming from a main body of the solenoid actuator 40 protrude outward.

The solenoid actuator 401 includes a pair of components with the two regulating pins 601 and 602 correspond. In particular, the solenoid actuator includes 401 Do the washing up 451 and 452 , Flaps 501 and 502 , Permanent magnet 521 and 522 , Adapter 551 and 552 , Piston 651 and 652 , Feathers 761 and 762 and / or the like. It is to be noted that the components each of which is indicated by 1 as the last digit of the three-digit reference number correspond to each other, and the components each of which is indicated by 2 as the last digit of the three-digit reference number correspond to each other. Thus, hereinafter a component denoted by 1 as the last digit of the three-digit reference will be preceded by the word "first, r", and a component denoted by a 2 as the last digit of the three-digit reference, the word "second, r "prefixed. In this way, the first component and the second component are distinguished from each other.

The regulatory pins 601 and 602 and the pistons 651 and 652 can act as moving areas. The first regulatory pin 601 and a first piston 651 are integrally joined together and are arranged on a pin axis P1. The first regulatory pin 601 and the first piston 651 can be from a very retracted position in 1 is shown to a fully extended position in 3 shown is to be moved back and forth. The second regulatory pin 602 and the second piston 652 are integrally joined together and are arranged on a pin axis P2. The second regulatory pin 602 and the second piston 652 are similar to the first regulatory pin 601 and the first piston 651 movable.

An extension distance of the regulating pins 601 and 602 and the piston 651 and 652 from the fully retracted position represents a stroke. The fully retracted position of the regulating pins 601 and 602 and the piston 651 and 652 represents a zero stroke. The fully extended position of the regulating pins 601 and 602 and the piston 651 and 652 represents a full stroke. In the following description, a direction of extension or a front side of the lower direction in FIG 1 . 3 and 4 and a direction of retraction or a reverse direction may be in the upper direction 1 . 3 and 4 correspond. The direction in which the regulating pins 601 and 602 extended and retracted, provided an axial direction of the solenoid actuator 401 A direction perpendicular to the axial direction of the solenoid actuator 401 is, represents a radial direction.

The spools 451 and 452 , the flaps 501 and 502 , the permanent magnets 521 and 522 and the adapters 551 and 552 form a fixed area. In addition to these components also form rear yokes 411 and 412 , Coil cores 421 and 422 , front yokes 431 and 432 , a sleeve 70 , a mounting plate 78 and the like the fixed area. The fixed area is a static component compared to a movable area such. B. the piston 651 and 652 and / or the like. Hereinafter, the configuration of the fixed area will be described in order. Then the description of the configuration of the movable area is made.

The back yokes 411 and 412 , the coil cores 421 and 422 , the front yoke 431 and 432 and the like are soft magnetic elements forming magnetic circuits. The fixed portion has a rearwardly disposed outer shell, and the outer shell is made of a resin having a resin molded portion 47 shaped. More specifically, the back yokes 411 and 412 , the coil cores 421 and 422 , the front yoke 431 and 432 , the spools 451 and 452 , Spool drums 461 and 462 and the like made of the resin having the resin molded portion 47 formed. These mold components are on the back of the mounting plate 78 integrally formed. The resin molded area 47 has two magnetic accommodation holes 481 and 482 open on the back. The resin molded area 47 is with a connector 49 equipped, which protrudes to the rear.

The back yokes 411 and 412 and the front yokes 431 and 432 are each formed in the form of a plate and arranged parallel to each other. The back yokes 411 and 412 and the front yokes 431 and 432 cut the pin axes P1 and P2 at right angles. The coil cores 421 and 422 are each tubular and each have coil axes C1 and C2. The coil cores 421 and 422 connect each of the rear yokes 411 and 412 with the front yokes 431 and 432 , The pin axes P1 and P2 are each with the front yokes 431 and 432 connected. The piston guide areas 441 and 442 are each tubular and each formed around the pin axes P1 and P2. The piston guide areas 441 and 442 are connected to each other at a position between the pin axes P1 and P2.

The spool drums 461 and 462 are each at the outer peripheries of the coil cores 421 and 422 appropriate. The spools 451 and 452 are formed by winding wires so that they wind around the outer periphery of each of the spool drums 461 and 462 form. The spool drums 461 and 462 are made of resin, so that the coil cores 421 and 422 of each of the windings of the coils 451 and 452 are isolated. From an external electrical power source is through the connector 49 one of the coils 451 and 452 , which corresponds to the operating-side regulating pin, supplied with power, thereby causing the one of the coils 451 and 452 generates a magnetic field. The magnetic field causes a magnetic flux that moves along a path in one direction. The way and the direction of the magnetic flux will be discussed later.

The magnet placement holes 481 and 482 of the resin molded area 47 are each formed in the form of a tube and each centered on magnetic axes M1 and M2. In the magnet housing holes 481 and 482 are each the adapters 551 and 552 , the permanent magnets 521 and 522 and the flaps 501 and 502 housed in this order from the lower side.

As in 2 and 4 is shown have the magnet accommodating holes 481 and 482 inner walls on each of which interior threaded areas 413 and 414 uncover. The internal thread areas 413 and 414 are each on the back yokes 411 and 412 educated. The flaps 501 and 502 have sidewalls, each having external thread areas 51 define. The external thread areas 51 are each with the internal thread areas 413 and 414 screwed. In this way, the external thread areas 51 each through the back yokes 411 and 412 held, so they each have the permanent magnet 521 and 522 surround.

The flaps 501 and 502 form the fixed area and have upper end surfaces, on each of which magnetometric sensors 801 and 802 are set up. The magnetometric sensors 801 and 802 may function as magnetic field detection units for detecting the magnetic flux density. The magnetometric sensors 801 and 802 according to the present embodiment are Hall elements. It should be noted that the magnetometric sensors 801 and 802 According to another embodiment, magnetoresistive (MR) elements or the like may be. The magnetometric sensors 801 and 802 may be embedded in recessed or shaped areas, respectively in the flaps 401 and 502 are formed. Alternatively, the magnetometric sensors 801 and 802 each on surfaces of the flaps 501 and 502 be provided. According to the present configuration, the magnetometric sensors are 801 and 802 according to the present embodiment on end surfaces on the opposite side of the permanent magnets 521 and 522 from each of the pistons 651 and 652 set up. The arrangement facilitates the installation of the magnetometric sensors 801 and 802 from the top of the flaps 501 and 502 without the need for a dedicated space. Power cable for the magnetometric sensors 801 and 802 , such as Cables that are coupled to the electrical power source, cables that are grounded, signal lines, and / or the like, are routed through a path, not shown, and into the connector 49 moved in. The power cables for the magnetometric sensors 801 and 802 are coupled to an external control device.

As in 5 to 7 shown, form the permanent magnets 521 and 522 and the coils 451 and 452 Magnetic circuits through which the magnetic fluxes passing through each of the coils 451 and 452 be generated, get. As later in the description is specified, the magnetometric sensors 801 and 802 provided on the magnetic circuits to detect the density of the magnetic fluxes passing through the magnetic circuits, respectively. That means that the magnetometric sensors 801 and 802 capture the intensity of the magnetic fluxes. The solenoid actuator 401 determines operating conditions, such. B. amounts of an extension and retraction of the regulatory pins 601 and 602 according to the output signals from the magnetometric sensors 801 and 802 , Thus, the solenoid actuator determines 401 whether the regulatory pins 601 and 602 each have been extended and retracted.

Each one of the permanent magnets 521 and 522 is formed plate-shaped with a circular shape in cross-section, which has been created along the radial direction. Each one of the permanent magnets 521 and 522 has a diameter that is greater than the diameter of a corresponding one of the pistons 651 and 652 , According to the first embodiment, the first permanent magnet 521 and the second permanent magnet 522 magnetized such that their magnetic poles are directed in the same direction. In the illustrated example, the first permanent magnet respectively 521 and the second permanent magnet 522 the N-pole on the side of the flaps 501 and 502 on, and the S-pole on the side of the piston 651 and 652 , It should be noted that each of the first permanent magnet 521 and the second permanent magnet 522 the S-pole on the side of the flaps 501 and 502 and the N-pole on the side of the pistons 651 and 652 having.

Each of the adapters 551 and 552 is made of a soft magnetic material, such. As a ferrous material formed. The adapters 551 and 552 are at the ends of the permanent magnets 521 and 522 on the side of each of the pistons 651 and 652 set up. The adapters 551 and 552 are each with the permanent magnet 521 and 522 magnetized. The adapters 551 and 552 can act as magneto-convergent elements that control the magnetic fluxes of the permanent magnets 521 and 522 converge and merge and the merged magnetic fluxes respectively to the pistons 651 and 652 to transfer.

Each of the adapters 551 and 552 has a body 550 and a mounting area 56 on. The body 550 is plate-shaped and has a cross-sectional area in the radial direction, the cross-sectional area being equivalent to the cross-sectional area of the corresponding one of the permanent magnets 521 and 522 , The attachment area 56 has a protruding, tapered shape and stands from the body 550 towards a corresponding one of the pistons 651 and 652 in front. It should be noted that the tapered shape has the shape of a blunt cone. Axes Q1 and Q2 of the mounting areas 56 are offset from the respective magnetic axes M1 and M2. The axes Q1 and Q2 coincide with the pin axes P1 and P2, respectively, within a deviation center.

The sleeve 70 forms an outer shell from a front portion of the fixed area. The sleeve 70 is tubular and is on the front of a central region of the mounting plate 78 arranged. The sleeve 70 has an accommodation hole 72 on. Each one of the regulatory pens 601 and 602 and each of the feathers 761 and 762 is in the accommodation hole 72 accommodated. The accommodation hole 72 has a hole end 74 on. Each of the sliding holes 751 and 752 is in the corresponding hole end 74 educated. The regulatory pins 601 and 602 can each be along the slide holes 751 and 752 slide. sockets 731 and 732 are each inside the piston guide areas 441 and 442 appropriate.

The regulatory pins 601 and 602 and the pistons 651 and 652 can act as moving areas. Subsequently, the first regulatory pin 601 and the first piston 651 as a typical example. The regulatory pin 601 includes an axle main body 611 , a connection area 621 that with the piston 651 connected, and a cuff area 631 which are coaxial with the pin axis P1. The cuff area 631 forms a seating surface of the spring 761 , The cuff area 631 can be achieved by press fitting a cuff which is a separate component from the axle main body 611 is, to the axis main body 611 be formed. Alternatively, the cuff area 631 integral with the axle main body 611 be educated.

Much of the axle main body 611 is with the exception of a front end 641 in the sleeve 70 accommodated. The axle main body 611 gets along a hole of the socket 731 on the back of the sleeve 70 guided. The axle main body 611 gets along the sliding hole 751 on the front of the sleeve 70 guided. Thus, the axle main body can 611 relative to the socket 731 and the sliding hole 751 slide. The front end 641 stands from the sleeve 70 in front. The front end 641 is fitted to a fitting groove of a slider of the valve lift control device when an extension movement is made.

The piston 651 has a tubular shape and is made of a soft magnetic material, such. As a ferrous material formed. The piston 651 is with the connection area 621 of the regulatory pin 601 connected. The piston 651 is through the piston guide area 441 guided. The piston 651 becomes integral with the regulation pin 601 extended and retracted. The adapter 551 has an end surface on the side of the piston 651 on, and the end surface is with a pickup area 66 fitted. The pickup area 66 is in a tapered recessed shape and takes the fit range 521 on. The piston 651 is due to a magnetic attraction of the permanent magnet 521 towards the adapter 551 biased in the retraction direction. When the piston 651 through the adapter 551 is attracted, the fit range 56 of the adapter 551 in the pickup area 66 of the piston 651 fit. The second regulatory pin 602 and the second piston 652 may have the configuration described above.

The feathers 761 and 762 are at the outer peripheries of the axle main body 611 and 612 from each of the regulatory pins 601 and 602 fit. The feathers 761 and 762 be at both ends between each of the jacks 731 and 732 and the cuff areas 631 and 631 carried. The feathers 762 and 762 tighten the cuff areas 631 and 632 before, so the cuff areas 631 and 632 each from the jacks 731 and 732 be moved away. This is how the springs stretch 761 and 762 each the regulatory pins 601 and 62 in the extension direction.

As described above, the first piston 651 and the first regulatory pin 601 integral with each other, and the second piston 652 and the second regulatory pin 602 are integrally connected. Both the first piston 651 as well as the first regulatory pin 601 and both the second piston 652 as well as the second regulatory pin 602 take the magnetic attractions from the permanent magnets 521 and 522 on and take the spring forces from each of the springs 761 and 762 in opposite directions. As the magnetic force of attraction changes, the pistons move 651 and 652 in one direction along one of the magnetic attraction force and the spring force, which is larger than the other, respectively.

Subsequently, with reference to 5 and 7 the description of the operation of the solenoid actuator 401 with the configuration described above. 5 shows magnetic fluxes that pass through the magnetic circuits in a de-energized state. 6 shows magnetic fluxes that pass through the magnetic circuits when a power supply to the first coil 451 is started, so that the magnetic circuits power is supplied. 7 shows magnetic fluxes passing through the magnetic circuits when a power supply to the first coil 451 is finished, so that the magnetic circuits are de-energized after the first regulating pin 601 has completed the extension movement. As in 5 to 7 shown are the magnetometric sensors 801 and 802 set up on the respective magnetic circuits.

(Powerless state)

As in 5 is shown, form in the de-energized state, a magnetic flux ΦM1, by the first permanent magnet 521 is generated, and a magnetic flux ΦM2, by the second permanent magnet 522 is generated, each independent closed circles. The first permanent magnet 521 generates the magnetic flux ΦM1 at the N pole of the first permanent magnet 521 so that this through the first flap 501 , the first rear yoke 411 , the first coil core 421 , the first front yoke 431 , the first piston guide area 441 , the first piston 651 and the first adapter 551 arrives. The magnetic flux ΦM1 reaches the S pole of the first permanent magnet 521 , The magnetic flux ΦM2 passing through the second permanent magnet 522 is generated passes through a path which is symmetrical to the above-described path. In the present state, the magnetometric sensor will detect 801 which is arranged on the magnetic path of the magnetic flux ΦM1, and the magnetometric sensor 802 which is arranged on the magnetic path of the magnetic flux ΦM2, respectively, the magnetic flux density in the magnetic paths.

(Start the power supply to the first coil)

6 shows one of the first coil 451 supplied electric power. The electric current flows from the back of the drawing to the front of the drawing on the left side relative to the coil axis C1. The electric current continues to flow from the front of the drawing to the back of the drawing on the right side relative to the coil axis C1. Thus, the electric current causes the first coil core 421 generates a coil magnetic flux .phi.C (long dashed line) which moves upward from the lower side in the drawing. The coil magnetic flux .phi.C is generated in one direction, so that the magnetic flux .PHI.M1 passing through the first permanent magnet 521 is generated is canceled. As a result, the magnetic attraction on the first piston decreases 651 acts, from. In this way, a restraining force, which is the first piston 651 at the very retracted position, canceled. Thus begins the first regulatory pin 601 while applying the biasing force from the first spring 761 extend.

(End of power supply to the first coil)

As in 7 shown is the power supply to the first coil 451 ended when the first regulatory pin 601 reached the very extended position. It should be noted that, depending on the balance between the spring force and the magnetic attraction, the power supply in the course of the stroke after the start of the extension movement of the regulating pin 601 can be stopped. In the present state, the power supply to the first coil 451 stops, whereby the coil magnetic flux ΦC is eliminated. Thus, only the magnetic flux ΦM1 and ΦM2 remain similar to the currentless state (see 5 ). The position of the first piston 651 in the magnetic flux path of the magnetic flux ΦM1 differs from the position in the de-energized state. This differentiates the magnetic flux density with that of the magnetometric sensor 801 is detected by the magnetic flux density in the de-energized state.

When power is supplied to the first coil (current supply state of the first coil), the first regulating pin functions 601 as the operational regulatory pin, and the front end 641 of the first regulatory pin 601 is fitted in the fitting groove of the slider. Compared to the above description, when the second regulating pin 602 as the operating-side regulating pin is extended, the second coil 452 supplied such current that the second coil core 422 generates the coil magnetic flux .phi.C in the magnetic flux canceling direction .phi.2, which is through the second permanent magnet 522 is produced. In this way, the second spool core generates 422 the coil magnetic flux ΦC in the direction from the upper side to the lower side in the drawing.

With the present configuration of the solenoid actuator 401 be the two regulatory pins 601 and 602 not energized when de-energized. In addition, only the first regulatory pin 601 activated in the power supply state of the first coil, and only the second regulating pin 602 is activated in a power supply state of the second coil. In the present structure, the solenoid actuator 401 configured to supply the power to the coils 451 and 452 turns on, reducing one of the two regulating pins 601 and 602 is selectively activated.

Subsequently, experimental data will be described with reference to the timing chart of 8A to 8C described. In the drawing, in the state of the coil current supply, 8A a coil current, 8B represents an output of a magnetometric sensor, and 8C represents a regulating pin stroke change. In the present example, the output of the magnetometric sensor is a voltage signal. In 8B and 8C The solid line represents data when the first regulatory pin 601 is normally activated, and the dashed line represents data in the non-activated state when the first magnetic flux ΦM1 is forcedly fixed at the fully retracted position.

The state before the time t0 in 8A to 8C corresponds to the de-energized state in 5 , The output of the magnetometric sensor is an initial output V0 corresponding to the magnetic flux density of the magnetomagnetic flux ΦM1 when the regulating pin 601 is in the completely retracted position. The time span between t0 and t1 corresponds to the start of the power supply to the coil in 6 , In particular, the power supply to the coil 451 started at time t0, and the coil current increases from 0 to ION. The sum of the magnetic force passing through the coil 451 is generated, and the spring force exceeds the magnetic attraction of the permanent magnet 521 at time t1. At time t1, the regulating pin starts 601 extend. Besides, as the coil current increases, the coil magnetic flux φC increases in one direction, so that the magnetomagnetic flux φM1 is canceled. Therefore, the output of the magnetometric sensor decreases.

The time period t1 to t4 corresponds to the state between 6 and 7 , The regulatory pin 601 moves from a zero stroke L0 to a full lift Lf in the period t1 to t2. The regulatory pin 601 is retained at full stroke Lf after time t2. In a normal operating condition, the output of the magnetometric sensor indicated by the solid line undercuts after time t1 and converges to an output VfON until time t2. In contrast, the regulatory pin 601 forcibly retained at the zero stroke L0 in a non-activated state. In the non-activated state, the output of the magnetometric sensor indicated by the dashed line merges with an output V0ON after time t1. When the power supply is completed at time t3, the coil magnetic flux φC disappears and the output of the magnetometric sensor increases.

Subsequently, the coil current becomes zero at time t4. The time t5 corresponds to the end of the power supply of the coil in 7 , At time t5, the output of the magnetometric sensor in the normal operating state becomes the output Vf after operation. The post-operation output Vf corresponds to the magnetic flux density generated by the magnetomagnetic flux ΦM1. if the regulatory pin 601 is in the fully extended position. On the other hand, the output of the magnetometric sensor shown by the broken line in the non-activated state returns to the initial output V0. As described above, the initial output V0, that of the fully retracted position of the regulating pin 601 corresponds to, and the output Vf after operation, the very retracted position of the regulating pin 601 corresponds to an output difference ΔV in between.

In this way, in the power supply state of the first coil, the operating state of the regulating pin 601 according to the output difference ΔV between the output Vf after operation, and the magnetometric sensor 801 and the initial output V0 are determined. Likewise, in the power supply state of the second coil, the operating state of the regulating pin 602 according to the output difference ΔV between the output Vf after operation, and the magnetometric sensor 802 and the initial output V0 are determined. In addition, according to the result, it can be determined which of the regulating pins 601 and 602 is activated.

(Effect)

• (1) In der vorliegenden Ausführungsform sind die magnetometrischen Sensoren 801 und 802, die die magnetischen Flussdichten erfassen sollen, auf den jeweiligen Magnetkreisen angeordnet. Die Magnetkreise leiten die Magnetflüsse ΦM1, ΦM2 und ΦC, die durch die Dauermagneten 521 und 522 und die Spulen 451 und 452 erzeugt werden. Darüber hinaus erfasst das Solenoid-Stellglied 401 die Veränderung der magnetischen Flussdichte zwischen der in dem Zustand, in dem die Kolben 651 und 652 relativ zu den Dauermagneten 521 und 522 ausgefahren werden, und der in dem Zustand, in dem die Kolben 651 und 652 relativ zu den Dauermagneten 521 und 522 eingefahren werden. Mit der vorliegenden Konfiguration kann das Solenoid-Stellglied, das die Dauermagnete beinhaltet, die an dem feststehenden Bereich befestigt sind, den Betriebszustand der Regulierungsstifte 601 und 602 geeignet bestimmen.
• (2) Das Solenoid-Stellglied 401 der vorliegenden Ausführungsform ist mit den beiden Regulierungsstiften 601 und 602, die parallel zueinander angeordnet sind, ausgestattet. Darüber hinaus beinhaltet das Solenoid-Stellglied 401 ferner die beiden Kolben 651 und 652, die beiden Dauermagneten 521 und 522, die beiden Federn 761 und 762 der beiden magnetometrischen Sensoren 801 und 802 und dergleichen entsprechend zu den beiden Regulierungsstiften 601 und 602. Ein Strom wird der einen von den Spulen 451 und 452 zugeführt, so dass der magnetische Fluss in der entgegengesetzten Richtung des Dauermagneten erzeugt wird, der mit einem von den Regulierungsstiften korrespondiert, wodurch die magnetische Anziehungskraft reduziert wird. Somit wird der Regulierungsstift als der betriebsseitige Regulierungsstift ausgefahren. Das Solenoid-Stellglied weist die vorstehend beschriebene Zweistiftkonfiguration auf und ermöglicht die Bestimmung dessen, welcher von den Regulierungsstiften gemäß der Ausgabe der magnetometrischen Sensoren 801 und 802 ausgefahren wird.
• (3) In der vorliegenden Ausführungsform sind die magnetometrischen Sensoren 801 und 802 auf jeweils den Endoberflächen der Klappen 501 und 502 angeordnet. Die Klappen 501 und 502 sind auf der gegenüberliegenden Seite der Dauermagneten 521 und 522 von den jeweiligen Kolben 651 und 652 angeordnet. Die Anordnung benötigt für die magnetometrischen Sensoren 801 und 802 keinen eigens dafür vorgesehenen Raum. Darüber hinaus erleichtert die Anordnung die Installation und Verkabelung der magnetometrischen Sensoren 801 und 802. Demzufolge kann im Vergleich zur herkömmlichen Konfiguration gemäß der Patentschrift 1 die vorliegende Konfiguration in ihren Abmessungen verkleinert und vereinfacht werden.

The following is a description of the effects of the solenoid actuator 401 according to the present embodiment.

• (1) In the present embodiment, the magnetometric sensors are 801 and 802 , which are to detect the magnetic flux densities, arranged on the respective magnetic circuits. The magnetic circuits conduct the magnetic fluxes ΦM1, ΦM2 and ΦC, passing through the permanent magnets 521 and 522 and the coils 451 and 452 be generated. In addition, the solenoid actuator detects 401 the change in the magnetic flux density between the in the state in which the pistons 651 and 652 relative to the permanent magnets 521 and 522 be extended, and in the state in which the pistons 651 and 652 relative to the permanent magnets 521 and 522 be retracted. With the present configuration, the solenoid actuator including the permanent magnets fixed to the fixed portion can control the operating state of the regulating pins 601 and 602 determine suitably.
• (2) The solenoid actuator 401 the present embodiment is with the two regulating pins 601 and 602 , which are arranged parallel to each other, equipped. In addition, the solenoid actuator includes 401 also the two pistons 651 and 652 , the two permanent magnets 521 and 522 , the two springs 761 and 762 the two magnetometric sensors 801 and 802 and the like corresponding to the two regulating pins 601 and 602 , A current becomes one of the coils 451 and 452 is supplied so that the magnetic flux is generated in the opposite direction of the permanent magnet, which corresponds to one of the regulating pins, whereby the magnetic attraction force is reduced. Thus, the regulatory pen is extended as the operational regulatory pen. The solenoid actuator has the above-described two-pin configuration and enables determination of which of the regulating pins according to the output of the magnetometric sensors 801 and 802 is extended.
• (3) In the present embodiment, the magnetometric sensors are 801 and 802 on each of the end surfaces of the flaps 501 and 502 arranged. The flaps 501 and 502 are on the opposite side of the permanent magnet 521 and 522 from the respective pistons 651 and 652 arranged. The arrangement needed for the magnetometric sensors 801 and 802 no specially designated room. In addition, the arrangement facilitates the installation and wiring of the magnetometric sensors 801 and 802 , As a result, in comparison with the conventional configuration of the patent document 1, the present configuration can be downsized and simplified in size.

Second Embodiment

Subsequently, with reference to 9 a description of a solenoid actuator according to the second embodiment of the present disclosure. As in 9 is shown, a solenoid actuator 402 According to the second embodiment, the first permanent magnet 521 and the second permanent magnet 522 magnetized such that the direction of the magnetic pole of the first permanent magnet 521 and the direction of the magnetic pole of the second permanent magnet 522 are opposite to each other. In the example of 9 indicates the first permanent magnet 521 the N-pole on the side of the flap 501 and the S-pole on the side of the piston 651 on. In addition, the second permanent magnet has 522 the S-pole on the side of the flap 502 and the N-pole on the side of the piston 652 on.

According to the second embodiment, the two permanent magnets form 521 and 522 the magnetic circuit as follows. The N pole of the first permanent magnet 521 generates the magnetic flux ΦMM through the first flap 501 , the first rear yoke 411 , the first coil core 421 , the first front yoke 431 , the second front yoke 432 , the second coil core 422 , the second rear yoke 412 and the second flap 502 happen should. Thus, the magnetic flux ΦMM reaches the S pole of the second permanent magnet 522 , The N pole of the second permanent magnet 522 generates the magnetic flux ΦMM passing through the second adapter 552 , the second plunger-hoist 652 , the piston guide areas 441 and 442 , the first piston 651 and the first adapter 551 should happen. Thus, the magnetic flux ΦMM reaches the S pole of the first permanent magnet 521 , The permanent magnets 521 and 522 which are adjacent to each other have different magnetic poles, and the different magnetic poles cause therebetween a slight magnetic short circuit .phi.SC. This configuration may differ slightly from the first embodiment.

Apart from the slight difference from the first embodiment, the present second embodiment may have a commonality with the first embodiment. More specifically, the configuration according to the second embodiment is configured to correspond to the two coils 451 and 452 , each with the two permanent magnets 521 and 522 correspond, independently supplying current, so that the coil magnetic flux ΦC is generated. In this way, the configuration eliminates the attraction of the permanent magnet, which corresponds to the coil to which the current is applied, thereby extending the piston and the regulating pin by exerting the spring force.

In addition, the output of the first magnetometric sensor changes 801 if the regulatory pin 601 the extension has stopped to ΔV compared to the de-energized state (see 8A to 8C ). Therefore, the configuration according to the second embodiment similar to the first embodiment enables the determination of the operating state of the regulating pins 601 and 602 according to the output of the magnetometric sensors 801 and 802 and the identification of which of the regulatory pens 601 and 602 has been extended.

Third Embodiment

Next, a description will be given of a solenoid actuator according to the third embodiment of the present disclosure with reference to FIG 10 , As described above, each of the configurations of the first and second embodiments uses a two-coil and a two-pin configuration. In particular, the two coil and two pin configurations include the pair of coils 451 and 452 , the permanent magnets 521 and 522 , the feathers 761 and 762 , the pistons 651 and 652 , the regulatory pins 601 and 602 and / or the like. On the other hand, the configuration uses a solenoid actuator 403 the third embodiment, a single-coil and two-pin configuration. In particular, the single coil and two pin configuration includes a single coil 453 , a pair of regulating pins 601 and 602 and / or the like. The single reel and two pin configuration can refer to 7 the disclosure of the unaudited Japanese Patent Application No. 2013-258888 ,

In 10 can the regulating pins 601 and 602 and the pistons 651 and 652 of the solenoid actuator 403 be denoted by the reference numerals which are identical to those of the first embodiment. It should be noted that the components in a sleeve 703 from those in the pod 70 can distinguish the first embodiment in aspect ratio and shape. Regardless, the components in the sleeve can 703 have the same configurations as those in the sleeve 70 the first embodiment. Therefore, the components in the sleeve 703 with the reference numerals that correspond to those of the components in the sleeve 70 are identical according to the first embodiment.

Hereinafter, the difference from the third embodiment to the first embodiment will be described in brief. In particular, the configuration of the fixed area of the coil becomes 453 , such as B. a yoke 313 described in the upper part of the drawing. The yoke 313 has a shape of a double-executed tube and is made of a soft magnetic material, such. As a ferrous material formed. The sink 453 , the permanent magnets 531 and 532 , the pistons 651 and 652 and / or the like form a magnetic circuit with each other. The yoke 313 includes an outer tubular portion 323 , which is the outer circumference of a bobbin drum 463 surrounds. The yoke 313 includes an inner tubular portion 333 that the movement of the pistons 651 and 652 should lead.

A stator 343 is in the form of a plate and is made of a soft magnetic material such. As a ferrous material formed. The stator 343 surrounds the opposite side of the permanent magnet 531 and 532 from the pistons 651 and 652 , That means that the stator 343 the third embodiment of the flaps 501 and 502 the first embodiment in relation to the permanent magnets 531 and 532 can correspond. A first magnetometric sensor 801 is on the end surface of the stator 343 set up. The first magnetometric sensor 801 is directly on the upper side of the first permanent magnet 531 arranged. A second magnetometric sensor 802 is on the end surface of the stator 343 arranged. The second magnetometric sensor 802 is directly on the upper side of the second permanent magnet 532 arranged.

The magnetometric sensors 801 and 802 are arranged on the magnetic circuit. The magnetometric sensors 801 and 802 do not necessarily need specially designed space for them. In addition, the magnetometric sensors can 801 and 802 easily from the top of the stator 343 be installed. Similar to the first embodiment, the magnetometric sensors 801 and 802 be embedded in the recessed areas that are in the stator 343 are formed. The magnetometric sensors 801 and 802 can on the surface of the stator 343 be attached. The wiring of the magnetometric sensors 801 and 802 is installed along a path not shown and with the external control device via a connector 38 connected.

An external electrical power source leads to the coil 453 current through the connector, which causes the coil 453 generates the coil magnetic flux .phi.C. The coil magnetic flux ΦC flows through the yoke 313 made of a soft magnetic material, the stator 343 , the pistons 651 and 652 and / or the like. The external electric power source may be the direction (power supply direction) of the coil 453 supply current, thereby causing the coil 453 generates a coil magnetic flux ΦC2 in the opposite direction. The bobbin drum 463 is formed of resin and inside the outer tubular portion 323 of the yoke 313 arranged. The bobbin drum 463 surrounds the circumference of the coil 453 and isolate the coil 453 , The connector 38 is integral with the bobbin drum 463 made of resin.

The permanent magnets 531 and 532 are in the holding device or socket 353 housed, which is made of a non-magnetic material, and are on the holding device or socket 353 attached. The third embodiment uses the reel-in configuration. Therefore, the direction of the coil magnetic flux ΦC is along one side. Thus, in the configuration of the third embodiment, the magnetic fluxes of the permanent magnets extend 531 and 532 in different directions, thereby differentiating the directions of the permanent magnets 531 and 532 is possible. Taking into account this fact, the permanent magnets 531 and 532 magnetized so that the magnetic poles are in opposite directions.

In the example of 10 indicates the first permanent magnet 531 the N pole on the side of the stator 343 and the S-pole on the side of the piston 651 on. In addition, the second permanent magnet has 32 the S-pole on the side of the stator 343 and the N-pole on the side of the piston 652 on. The permanent magnets 531 and 532 have the ends on the side of each piston 651 and 652 on, and the ends are with adapters 571 and 572 set up.

The configuration according to the present third embodiment is configured to adjust the current supply direction for the coil 453 can switch. In this way, the configuration generates in the in 10 In the example shown, the coil magnetic flux .phi.C in the direction for canceling the magnetic flux .PHI.M1 of the first permanent magnet 531 , In this way, the configuration reduces that through the first permanent magnet 531 generated force, so that the first piston 651 is attracted. Thus, the first regulatory pin 601 by the application of the biasing force of the first spring 761 extended. On the other hand, when the configuration supplies the current in the opposite direction, the coil magnetic flux ΦC2 becomes in the direction of canceling the magnetic flux ΦM2 of the second permanent magnet 532 generated. Accordingly, the second regulatory pin 602 extended.

Similar to the first embodiment, the magnetic flux density changes with the magnetometric sensors 801 and 802 is detected, between the state in which the regulatory pins 601 and 602 be retracted, and the state in which the regulatory pins 601 and 602 be extended. Accordingly, the downsized and simplified configuration according to the third embodiment, similarly to the first embodiment, enables the determination of the operating state of the regulating pins 601 and 603 according to the output of the magnetometric sensors 801 and 802 and the identification of which of the regulatory pens 601 and 602 has been extended.

Fourth Embodiment

Next, a description will be given of a solenoid actuator according to the fourth embodiment of the present disclosure with reference to FIG 11 , A solenoid actuator 404 according to the fourth embodiment uses a Einspulen- and Einstiftkonfiguration. In particular, the single reel and pin configuration includes the first regulating pin 601 and the corresponding components and waives the second regulatory pin 602 and corresponding components of the solenoid actuator 403 according to the third embodiment. The single reel and two pin configuration can refer to 19 the publication of the unaudited Japanese Patent Application No. 2013-258888 ,

In 11 have the components of the solenoid actuator 404 Functionalities that are substantially the same as those of the solenoid actuator 403 (please refer 10 ) of the third embodiment correspond. In particular, have an outer tubular region 324 and an inner tubular portion 334 a yoke 314 , a stator 344 , the version 354 , the sink 454 , a bobbin 464 and a sleeve 704 Functionalities of corresponding components of the solenoid actuator 403 and are denoted by reference numerals in which the last number of the corresponding component denoted by 3 has been replaced by 4. A permanent magnet 541 has the functionality of that of the two permanent magnets 531 and 532 according to the third embodiment, which has been combined into a component in the concentric shape centering on the pin axis P1. An adapter 581 has the same functionality as the two adapters 571 and 572 according to the third embodiment, which has been combined into a component in the concentric shape centering on the pin axis P1.

A single magnetometric sensor 801 which is similar to those of the above-described embodiments is on the end surface of the stator 344 on the piston 651 opposite side of the permanent magnet 541 set up. Similar to the above-described embodiments, the magnetometric sensor is 801 arranged on the magnetic circuit. For the magnetometric sensor 801 is not necessarily dedicated space required. In addition, the magnetometric sensor can 801 easily from the top of the stator 344 be installed.

In the example of 11 points the stator 344 the N-pole on the side of the piston 651 and the S-pole on the side of the permanent magnet 541 on. When the coil 454 Current is supplied, the coil magnetic flux ΦC in the direction to cancel the magnetic flux ΦM1 of the permanent magnet 541 generated, reducing the force of the permanent magnet 541 that the piston 651 attracts, is reduced. Thus, the regulatory pin 601 by applying the biasing force of the spring 761 extended. In the present state, the magnetic flux density changes with the magnetometric sensor 801 is captured, between the state in which the regulatory pen 601 is retracted, and the state in which the regulatory pen 601 is extended. Accordingly, the downsized and simplified configuration enables the determination of the operating state of the regulating pin 601 according to the output of the magnetometric sensor 801 ,

Other Embodiment

• (a) According to the above-described embodiments, the magnetometric sensors are 801 and 802 arranged on the magnetic circuits. In addition, the magnetometric sensors 801 and 802 on the end surfaces of the flaps 501 and 501 or the end surfaces of the stators 353 and 354 on the respective pistons 651 and 652 opposite side of the permanent magnet 521 and 522 set up. In contrast, the magnetometric sensors 801 and 802 as in a solenoid actuator 405 , this in 12 is shown, be arranged on the magnetic circuits and on the side of the piston 651 and 652 relative to the respective permanent magnets 521 and 522 be arranged. The magnetometric sensors 801 and 802 can z. B. at the respective front yokes 431 and 432 be arranged. Even in the present configuration, the magnetic flux density changes that of the magnetometric sensors 801 and 802 capture, between the state in which the regulatory pins 601 and 602 be retracted, and the state in which the regulatory pins 601 and 602 be extended. Accordingly, the present configuration enables the determination of the operating state of the regulating pins 601 and 602 ,
• (b) In the above embodiments, the configuration generally detects the regulation pins in the stable position 601 and 602 according to the output of the magnetometric sensors 801 and 802 , The stable position can be the fully retracted position or the fully extended position. It should be noted that it may be difficult for an actual product to meet a required accuracy when a stroke of the regulating pins 601 and 602 is detected dynamically during operation. The dynamic detection may be subject to the influence of a variation of the magnetomotive coil force, a variation in the magnetism of the permanent magnet, and a variation of the spring force and / or the like. The dynamic detection may be influenced by a response of the sensor signal. It should be noted that it is theoretically possible to estimate the stroke according to a change in the magnetic flux density detected with the magnetometric sensor. The detection can z. B. be made possible by the dimensional tolerance of the components is strictly handled and / or by an ambient temperature and / or an operating condition are regulated. Accordingly, within the scope of the present Disclosure an embodiment of a solenoid actuator for detecting the stroke.
• (c) In the above-described embodiments, the magnetic field detection unit is disposed on the magnetic circuit. The configuration of the components of the solenoid actuator, such as. As the elements of the magnetic circuit and the permanent magnet whose shape, physical relationship and / or the like are not limited to those in the embodiments. The mating area and the pickup area need not be set up in the adapter and the piston. The adapter and the piston can transmit the magnetic flux over planar surfaces. On the adapter can be omitted.
• (d) In the above embodiments, the solenoid actuators equipped with a regulating pin or two regulating pins are exemplified. It should be noted that the present disclosure can be applied to a solenoid actuator equipped with three or more regulating pins.

According to the present disclosure, the solenoid actuator may be used in a valve lift control apparatus for an internal combustion engine. The solenoid actuator may include the piston and the solenoid actuator. On the piston, an attraction force of the permanent magnet is exerted. When power is supplied to the coil, the attraction force of the permanent magnet is reduced. The solenoid actuator moves the regulating pin, which is connected to the piston, in the extension direction by exerting the biasing force of the spring. The permanent magnet should tighten the piston in the retraction direction. The permanent magnet is attached to the fixed area. The fixed area is fixed with respect to the piston. The magnetic field detection unit is set up on the magnetic circuit that conducts the magnetic flux. The magnetic flux is generated by the permanent magnet and the coil. The magnetic field detection unit detects the magnetic flux density.

The magnetic field detection unit detects the change in the magnetic flux density between the magnetic flux density in the state where the piston is retracted relative to the permanent magnet and the magnetic flux density in the state in which the piston is extended relative to the permanent magnet. The solenoid actuator has the configuration including the permanent magnet fixed to the fixed portion. The solenoid actuator is configured to properly determine the operating state of the regulating pin.

The magnetic field detection unit according to the present disclosure may be configured on the end surface on the side of the permanent magnet opposite to the piston. In the present arrangement, it is not necessary to have the space specially provided for the magnetic field detection unit, and the installation of the magnetic field detection unit may be simplified. Thus, in the present configuration, downsizing and simplification of the solenoid actuator are possible in comparison with the conventional configuration of the prior art of Patent Document 1.

The configuration according to the present embodiment may be applicable to the solenoid actuator including the two regulating pins arranged in parallel with each other. The solenoid actuator may include the two pistons, the two permanent magnets, the two springs and the two magnetic field detection units corresponding to the two regulating pins.

The solenoid actuator causes the coil to generate the magnetic flux in the opposite direction of the permanent magnet, which corresponds to one of the regulating pins, so that the magnetic attraction force is reduced when current is supplied to the coil.

Thus, the solenoid actuator moves the regulating pin as the operating-side regulating pin. The solenoid actuator enables the identification of that regulating pin which is operated in accordance with the output of the magnetic field detecting unit.

The above process steps, such as. For example, calculations and determinations may be made by any or all combinations of software, electrical circuitry, mechanical device, and the like. The software may be stored in a storage medium and may be transmitted via a transmission device, such as a computer. A network device. The electrical circuit may be an integrated circuit, and it may be a discrete circuit, such. B. a hardware logic that is configured with electrical and electronic elements or the like. The elements that trigger the above process steps may be discrete elements and may be partially or fully integrated.

It should be understood that while the methods according to the embodiments of the present disclosure have been described herein as including a specific sequence of steps, there are further alternative embodiments including various other sequences of those steps and / or additional steps not disclosed herein. include, as from the steps according to of the present disclosure.

Although the present disclosure has been described with reference to preferred embodiments thereof, it is to be understood that the disclosure is not limited to the preferred embodiments and constructions. The present disclosure is intended to include various modifications and equivalent arrangements. Besides the various combinations and configurations that are preferred, other combinations and configurations that include more, less or only a single element are also within the scope of the present disclosure.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 8448615 [0003]
• JP 2013-258888 [0021, 0022, 0060, 0070]

Claims (4)

A solenoid actuator for a valve lift control device, wherein the valve lift control device is configured to control a lift of an intake valve or a lift of an exhaust valve of an internal combustion engine, the valve lift control device having a slider rotatable with a camshaft, and which is movable in an axial direction relative to the camshaft, the solenoid actuator being configured to provide a regulating pin ( 601 . 602 ) extends when a front end ( 641 . 642 ) of the regulatory authority ( 601 . 602 ) is fitted in a fitting groove of the slider, wherein the solenoid actuator is further configured to cause the regulating pin to ( 601 . 602 ) is pushed back by exerting a torque of the camshaft when the front end ( 641 . 642 ) of the regulatory authority ( 601 . 602 ) is retracted from the fitting groove, wherein the solenoid actuator comprises: the regulating pin ( 601 . 602 ) configured to extend to the fitting groove; a piston ( 651 . 652 ), which is formed of a soft magnetic material, wherein the piston ( 651 . 652 ) has an end that with the regulating pin ( 601 . 602 ) connected is; a permanent magnet ( 521 . 522 . 531 . 541 ) fixed to a fixed area relative to the piston ( 651 . 652 ) and which is configured to engage the piston ( 651 . 652 ) attracts in a retraction direction; a coil ( 451 . 452 . 453 . 454 ) configured to cause a magnetic flux in an opposite direction of the permanent magnet ( 521 . 522 . 531 . 532 . 541 ) is generated, so that a magnetic attraction force is reduced, the piston ( 651 . 652 ) attracts; a feather ( 761 . 762 ), which is configured to use the regulating pin ( 601 . 602 ) in an extension direction, wherein the spring ( 761 . 762 ) is configured to apply a biasing force to the regulating pin ( 601 . 602 ), so that the regulatory 601 . 602 ) is moved in the extension direction when the coil ( 451 . 452 . 453 . 454 ) Power is supplied, so that the magnetic attraction of the permanent magnet ( 521 . 522 . 531 . 532 . 541 ) is reduced; and a magnetic field detection unit ( 801 . 802 ) arranged on a magnetic circuit configured to conduct a magnetic flux passing through the permanent magnet ( 521 . 522 . 531 . 532 . 541 ) and the coil ( 451 . 452 . 453 . 454 ), which is configured to detect a magnetic flux density. A solenoid actuator according to claim 1, wherein said magnetic field detection unit ( 801 . 802 ) is arranged on an end surface located on one of the piston ( 651 . 652 ) opposite side of the permanent magnet ( 521 . 522 . 531 . 532 . 541 ) is located. Solenoid actuator according to claim 1 or 2, wherein the regulating pin ( 601 . 602 ) two regulating pins ( 602 . 602 ), which are arranged parallel to each other; The piston ( 651 . 652 ) two pistons ( 651 . 652 ), the permanent magnet ( 521 . 522 . 531 . 532 ) two permanent magnets ( 521 . 522 . 531 . 532 ), the spring contains two springs ( 761 . 762 ), and the magnetic field detection unit ( 801 . 802 ) two magnetic field detection units ( 801 . 802 ) with the two regulatory pins ( 601 . 602 ) and when the coil ( 451 . 452 . 453 . 454 ) Power is supplied, the coil ( 451 . 452 . 453 . 454 ) is configured to cause a magnetic flux in an opposite direction from one of the permanent magnets ( 521 . 522 . 531 . 532 ), which is connected to one of the regulating pins ( 601 . 602 ), so that a magnetic attraction is reduced and one of the regulating pins ( 601 . 602 ) as a regulatory peg ( 601 . 602 ) is extended. Solenoid actuator, comprising: a piston ( 651 . 652 ) formed of a soft magnetic material; a regulatory pin ( 601 . 602 ), with one end of the piston ( 651 . 652 ), the regulating pin ( 601 . 602 ) has a front end configured to extend and retract; a permanent magnet ( 521 . 522 . 531 . 532 . 541 ) fixed to a fixed area relative to the piston ( 651 . 652 ) is fixed, wherein the permanent magnet ( 521 . 522 . 531 . 532 . 541 ) is configured to generate a magnetic flux and a magnetic attraction force, so that the piston ( 651 . 652 ) is tightened in a retraction direction; a coil ( 451 . 452 . 453 . 454 ) configured to cause a magnetic flux in an opposite direction of the magnetic flux of the permanent magnet ( 521 . 522 . 531 . 532 . 541 ), so that the magnetic flux of the permanent magnet ( 521 . 522 . 531 . 532 . 541 ) and the magnetic attraction is reduced; a feather ( 761 . 762 ) which is configured to apply a biasing force to the regulating pin ( 601 . 602 ), so that the regulatory 601 . 602 ) is moved in an extension direction when the coil ( 451 . 452 . 453 . 454 ) Power is supplied, so that the magnetic attraction of the permanent magnet ( 521 . 522 . 531 . 532 . 541 ) is reduced; and a magnetic field detection unit ( 801 . 802 ) arranged on a magnetic circuit configured so is that he has the magnetic flux of the permanent magnet ( 521 . 522 . 531 . 532 . 541 ) and the magnetic flux of the coil ( 451 . 452 . 453 . 454 ), wherein the magnetic field detection unit ( 801 . 802 ) is configured to detect a magnetic flux density.

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